JP2522778Y2 - X-ray equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray apparatus having an operation handle for outputting a signal for controlling a power assist mechanism for moving an image.

[0002]

2. Description of the Related Art FIG. 7 shows a configuration of a proximity X-ray fluoroscopy table which is an example of an X-ray apparatus. In the figure, reference numeral 1 denotes a base fixed to the floor, and a base 3 on which a top plate 2 is attached is rotatably supported on the base 1. The couch 3
An image system 4 and an X-ray generator (not shown) housed in the bed 3 are arranged opposite to each other with the top plate 2 interposed therebetween. The image system 4 includes an X-ray fluoroscopic unit including an image intensifier, a television camera, an optical system, and the like, and a film fast-moving device. Further, the video system 4 is provided with an operation handle 5, and the operator grasps the operation handle 5 and moves the video system 4 to X, X which are orthogonal to each other.
The subject is moved in the Y and Z directions to perform X-ray fluoroscopy of the subject. At this time, counterbalance weights (not shown) are provided to lightly move the video system 4 in each direction, and a power assist mechanism for supplementing human power in the X and Z directions. (Not shown)
Is also provided. The X-ray generator is also configured to always move in opposition to the image system 4 as the image system 4 moves.

The power assist mechanism in the X direction and the Z direction, for example, is configured by transmitting the output of a motor 6x, 6z to a pinion via a speed reducer, and mounting a rack meshing with the pinion in each direction. The video system 4 is moved in each direction according to the operation state of the operation handle 5 by the operator. Accordingly, the operation handle 5 is provided with a mechanism for detecting the operation state of the operator. A conventional mechanism for detecting the operation state is disclosed in, for example, Japanese Patent Application Laid-Open No. 63-240837. As described above, a microswitch or the like is used. That is, when the operator applies a force to the operation handle 5, the operation handle 5 is displaced, and the displaced state is detected by a microswitch or the like. Then, the motors 6x and 6z are rotationally driven in order to move the video system 4 (and the X-ray generator at the same time) in the operation direction (the X direction or the Z direction) detected by the microswitch or the like. The driving of the video system 4 in the Y direction is performed manually.

[0004]

However, the prior art having such a configuration has the following problems. That is, there is a problem that the movement of the video system 4 by the power assist mechanism cannot be performed smoothly. this is,
Since a conventional operation state detection mechanism uses a micro switch or the like, it can detect only the “ON” and “OFF” states, that is, whether or not to proceed in a direction corresponding to the micro switch. This is because it is not possible to obtain detailed information such as whether to move with the driving force.

A conventional operation state detecting mechanism is generally incorporated in the operation handle 5, and it is difficult to provide the operation handle 5 with, for example, an operation instruction switch for instructing the start of fluoroscopy or photographing. There is also a problem.

The present invention has been made in view of such circumstances, and has provided an X-ray apparatus provided with an operation handle capable of providing a fine operation of a power assist mechanism and providing an operation instruction switch on the operation handle. The purpose is to provide.

[0007]

The present invention has the following configuration to achieve such an object. In other words, the present invention provides an X handle provided with an operation handle for outputting a signal for controlling a power assist mechanism for moving a video system.
In the wire device, a shaft whose one end is supported at the base of the operation handle, a sleeve in which the shaft is slidably fitted along the axis, and a ring in which the sleeve is fitted,
The sleeve and the ring are attached so as to be rotatable in a direction perpendicular to the sliding direction of the shaft and in a direction perpendicular to each other, and a force is applied to the handle support portion supported by the X-ray device and the operation handle. A center return mechanism for returning the shaft, the sleeve, and the ring to their respective predetermined center positions, and a force when the operating handle is applied to the shaft, the sleeve, and the ring, respectively. And an operation state detection mechanism for detecting a displacement amount from the center position of the power assist mechanism and outputting a detection signal as a control signal of the power assist mechanism.

[0008]

The operation of the present invention is as follows. When no force is applied to the operation handle, the shaft, the sleeve, and the ring are returned to the predetermined center positions by the center return mechanism. When the operating handle is pushed or pulled in the axial direction of the shaft, the shaft slides and deviates from the center position, and the operation state detecting mechanism detects the amount of displacement of the shaft in the axial direction. This detection signal is used as a control signal for a power assist mechanism that moves the video system in the axial direction of the shaft. The power of this power assist mechanism is adjusted according to the amount of displacement,
Detailed operation of the power assist mechanism becomes possible. on the other hand,
When a force is applied to the operation handle in a direction perpendicular to the axis direction of the shaft, the sleeve and the ring are rotated and displaced from their respective center positions, whereby the operation state detection mechanism moves in the axis direction of the shaft. The amount of displacement in each of the directions orthogonal to each other and orthogonal to each other is detected. Based on these detection signals, a power assist mechanism for moving the video system in each direction is driven and controlled in accordance with each displacement amount. In addition, when the force applied to the operation handle is removed, the operation returns to the respective center positions by the center return mechanism, thereby preventing erroneous detection of the displacement amount. In this manner, the displacement of the operation handle in the XYZ directions orthogonal to each other is detected, and since the detection mechanism and the like are provided on the base side of the operation handle, the operation instruction switch can be incorporated in the handle. is there.

[0009]

An embodiment of the present invention will be described below with reference to the accompanying drawings. In this embodiment, the proximity X described in the conventional example is used.
A fluoroscopy table will be described as an example. In addition, among the reference numerals of the proximity X-ray fluoroscopy table according to the present embodiment shown in FIG. 1, the same reference numerals as those of the conventional example (see FIG. 7) are the same as those of the conventional example. Is omitted.

The structure of an operation handle, which is a characteristic part of the X-ray apparatus according to the embodiment of the present invention, will be described with reference to FIGS. In the drawing, reference numeral 7 denotes an operation handle according to the present embodiment, and the operation handle 7 is a handle support portion 10.
Are supported by the video system 4. As shown in FIG. 5 (a cross-sectional view taken along the line CC in FIG. 2), the ring 11 is supported by the handle support 10 by a pin 14 so as to be rotatable around a fulcrum a. A sleeve 13 is loosely fitted in the ring 11, and the sleeve 13 is supported by a pin 12 so as to be rotatable around a fulcrum b perpendicular to the fulcrum a. Further, a pipe-shaped shaft 15 is slidably inserted in the sleeve 13 in the axial direction (X direction), and one end of the shaft 15 is connected to and supported by the base of the grip 16 of the operation handle 7. ing. Note that, by swinging the grip portion 16 in the Y direction, the ring 11 rotates around the fulcrum a,
On the other hand, by swinging in the Z direction, the sleeve 13 rotates around the fulcrum b.

A substrate 18 to which a Hall effect sensor 17 is attached is fixedly mounted on the base end of the grip 16 with the shaft 15 penetrating therethrough. A magnet 19 passes through the sleeve 13 and is attached to one end of the sleeve 13. On the other hand, axis 15
The substrate 21 on which the Hall effect sensor 20 is mounted is also provided near the end opposite to the end supported by the gripper 16.
Are fixed in a state where the shaft 15 is penetrated, and the Hall effect sensors 22a to 22d are also provided on the surface of the handle support 10 facing the substrate 21 as shown in FIG. 3 (a view taken along the line AA in FIG. 2). The substrate 23 mounted at a 90 ° pitch as shown in FIG.
It is attached with the sleeve 13 penetrated.
Further, a ring-shaped magnet 24 is attached to the sleeve 13 between the substrates 21 and 23. The Hall effect sensors 17 and 20 and the magnets 19 and 24 correspond to an operation state detection mechanism that detects a displacement amount when the operation handle is operated in the X direction which is the axis direction of the shaft in the present invention,
The Hall effect sensors 22a and 22c and the magnet 24 correspond to an operation state detection mechanism that detects the rotation of the ring 11 in this invention, that is, the amount of displacement of the operation handle in the Y direction. 22d and magnet 2
Reference numeral 4 corresponds to an operation state detection mechanism that detects the rotation of the sleeve 13 in the present invention, that is, the displacement of the operation handle in the Z direction and the amount of displacement.

On the shaft 15, the other ends of the coil springs 25, one ends of which are supported by the substrates 18 and 21, respectively, press the collars 33 and 34 against the sleeve 13 and the stage of the shaft 15. That is, even if the shaft 15 is slid in the sleeve 13, the restoring force of the coil spring 25 returns the shaft 15 to a predetermined center position. The coil spring 25 corresponds to the shaft center return mechanism in the present invention. FIG. 4 (a cross-sectional view taken along line BB in FIG. 2).
As shown in FIG. 7, a U-shaped member is formed by connecting one end of each of the two L-shaped thin plates 26 to sandwich the sleeve 13, and a coil spring 27 is provided between the unconnected ends of the thin plates 26. Are attached to each sheet 26
A center return mechanism 29z corresponding to the sleeve center return mechanism in the present invention in which a pin 28 is provided inside
Is also provided. When the operation handle 7 is swung in the Z direction, the center return mechanism 29z rotates one thin plate 26 outward and the other thin plate 26
When the rotation applied to the operation handle 7 is removed and the force applied to the operation handle 7 is removed, the sleeve 1
3 is returned to the predetermined center position. Further, a center return mechanism 29y (see FIG. 4) of the ring 11 in which the connecting portions of the thin plates are shifted by 90 ° in the Y direction is provided in the same configuration as the above-described center return mechanism 29z. The center return mechanism 29y in the Y direction corresponds to the ring center return mechanism in the present invention. The center return mechanism 29y
By rotating the sleeve 13 in the Y direction,
The ring 11 is returned to the center.

A switch 30 for instructing X-ray fluoroscopy and a switch 3 for instructing X-ray imaging are provided on the grip 16 of the operating handle 7.
1. A switch 32 for instructing the evacuation of the video system 4 is attached. The switch 30 for instructing X-ray fluoroscopy and the switch 31 for instructing X-ray imaging are switches for instructing start and stop of X-ray fluoroscopy and X-ray imaging, respectively. This is a switch for giving an instruction to retract the video system 4 from above the top board 2. Each switch 3
Each of 0 to 32 is constituted by a push button switch or the like, and a connection line for transmitting each instruction is connected to each drive unit via a hollow tube of the shaft 15.

Next, the operation of each part associated with the operation of the operation handle described above will be described with reference to FIG. First, the shaft 15 slides in the sleeve 13 by pushing or pulling the operation handle 7 in the X direction. As a result, the shaft 15 shifts from the center position, and the Hall effect sensor 1
The output values of 7 and 20 change. These output values are sent to the X-direction drive control unit 8x, and the X-direction drive control unit 8x calculates the difference between the sent output values of the Hall effect sensors 17 and 20, and calculates the displacement amount in the X direction based on the difference value. In order to identify and drive the power assist mechanism of the video system 4 in the X direction,
The motor 6x is driven to rotate. At this time, the driving force of the power assist mechanism is adjusted by adjusting the rotation speed of the motor 6x according to the displacement amount. When the force applied to the operation handle in the X direction is removed, the center return mechanism automatically returns to the center position. The output values of the Hall effect sensors 17 and 20 at the center position are adjusted so as to have the same value.

By swinging the operating handle 7 in the Y and Z directions, the magnet 24 attached to the sleeve 13 swings, and the output values of the Hall effect sensors 22a to 22d change. The output values of the Hall effect sensors 22a and 22c are sent to the Y-direction drive controller 8y by the Hall effect sensor 2a.
The output values of 2b and 22d are sent to the Z-direction drive control unit 8z, respectively, and the Y-direction drive control unit 8y and the Z-direction drive control unit 8z
z, the Hall effect sensors 22a, 22
To calculate the difference between the output values of 2c, 22b, and 22d, specify the displacement amounts in the Y direction and the Z direction based on the difference values, and drive the power assist mechanism of the video system 4 in the Y direction and the Z direction. Then, the motors 6y and 6z are rotationally driven. At this time, the motor 6y,
The driving force of the power assist mechanism is adjusted by adjusting the rotation speed of 6z. When the force applied to the operation handle 7 in each direction is removed, the center return mechanism automatically returns to the center position. The power assist mechanism in the Y direction is similar to the power assist mechanism in the X and Z directions, for example,
The output of the motor 6y is transmitted to a pinion via a speed reducer, and a rack that meshes with the pinion is mounted in the Y direction.

In the above-described embodiment, the displacement in the XYZ directions is specified by the difference between the output values of the two Hall effect sensors. The amount of displacement in each direction may be specified based on the difference from the output value of the sensor at a certain time.

In the above embodiment, the displacement in the XYZ directions is detected by the Hall effect sensor and the magnet. However, the present invention is not limited to this, and it is sufficient if the displacement in each direction can be detected. For example, a configuration may be adopted in which the amount of displacement in each direction is detected by a differential transformer or the like.

Further, in the above-described embodiment, the operation handle of the proximity X-ray fluoroscopy table has been described as an example. However, for example, an X-ray tube or an image intensifier attached to a mobile X-ray apparatus can be used. For example, it may be used as an operation handle for instructing movement in the XYZ directions.

[0019]

As is apparent from the above description, according to the present invention, the displacement of the operating handle in the XYZ directions is detected, and the drive control by the power assist mechanism in each direction is performed. Since it can be performed according to the amount of displacement, fine control of the power assist mechanism becomes possible, and the video system can be smoothly moved. Further, a center return mechanism is provided, and when the force applied in each direction is removed, the center is returned to the respective center position, thereby preventing erroneous detection of the displacement amount. Further, since the detection of the operation state of the operation handle is not incorporated in the handle, various switches for operating instructions can be incorporated in the handle.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an overall configuration of a proximity X-ray fluoroscopy table according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating an entire configuration of an operation handle of the embodiment device.

FIG. 3 is a view as viewed in the direction of arrows AA in FIG. 2;

FIG. 4 is a sectional view taken along line BB of FIG. 2;

FIG. 5 is a sectional view taken along the line CC of FIG. 2;

FIG. 6 is a block diagram illustrating a drive control system of the embodiment device.

FIG. 7 is a perspective view showing an overall configuration of a conventional proximity X-ray fluoroscopic table.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Base 2 ... Top plate 3 ... Bed 4 ... Video system 6x, 6y, 6z ... Motor 7 ... Operation handle 8x, 8y, 8z ... X, Y, Z direction drive control part 10 ... Handle support part 11 ... Ring 13 ... Sleeve 15 ... Shaft 16 ... Grip part 17,20,22a-22d ... Hall effect sensor 18,21,23 ... Substrate 19,24 ... Magnet 25 ... Coil spring 29y, 29z ... Center return mechanism in Y direction and Z direction

Claims (1)

(57) [Scope of request for utility model registration] 1. An X-ray apparatus comprising an operation handle for outputting a signal for controlling a power assist mechanism for moving an image system, an axis having one end supported on a base of the operation handle, and an axis extending along the axis. A sleeve slidably fitted along the sleeve, a ring fitted with the sleeve, and the sleeve and the ring mounted rotatably in directions orthogonal to the sliding direction of the shaft and orthogonal to each other. A handle support portion supported by the X-ray device, and a center return mechanism that returns the shaft, the sleeve, and the ring to their respective predetermined center positions when no force is applied to the operation handle. When a force is applied to the operating handle, the amount of displacement of the shaft, the sleeve, and the ring from their respective center positions is detected, and An operation state detection mechanism that outputs the detection signal of (1) as a control signal of the power assist mechanism.